【摘要】 用溶胶 -凝胶法在多孔α -Al2 O3陶瓷衬底上制备了TiO2 微孔膜 ,经激光光散射仪、X -射线衍射仪、扫描电子显微镜、孔率计等对胶粒的大小、膜的结构、形貌和孔径分布等进行了表征 ,发现在孔直径为 0 .5μm的多孔载体上经浸渍 -干燥 -焙烧过程 ,能制得对牛血清白蛋白 (BSA)有 73.5%～ 92 .7%截留率、通量在 0 .2MPa压差下约 52L/(m2 ·h)的超滤膜 .更多还原

【Abstract】 Titania microporous membranes were prepared by sol-gel process.The titania sol obtained from hydrolysis of titanium tetra-isopropoxide was applied to porous-alumina substrate by a dipping process.Paritcle sizes in sol phase were examined by the dynamic laser-scattering technique.The properties of membrane were characterized by x-ray diffraction,scanning electron microscopy (SEM) and a mercury porosimeter.The porous titania membranes supported on porous ceramic with pore size 0.5 μm were prepared through coating-drying-calcining procedure.It is found that the rejection of these membranes for BSA was 73.5%～92.7% and flux was about 52 L (m 2·h).更多还原